One might expect New Orleans' high-ground areas to be in greater demand after Hurricane Katrina, but an analysis by the Greater New Orleans Community Data Center shows the city's riverside communities have lost households in the past 10 years. "One's relationship to a neighborhood, and the complications of land and property ownership, don't allow for an immediate detachment and heading for higher ground," said geographer Rich Campanella of Tulane University. The increase in vacancies is problematic, because unused housing can be costly.

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